139 - AIIMS community medicine mcqs or social and preventive medicine mcqs ( spm or psm ) from all previous years AIIMS papers with answers - part 32

161q: which one is the best indicator for hepatitis B infection in a community ?

a. hepatitis B surface antigen
b. hepatitis B surface antibody
c. core antibody
d. core antigen

 answer  c . core antibody .

162q: true regarding dengue fever is all except ?

a. hemorrhagic tendency
b. spontaneous remission
c. transmitted by anopheles mosquito
d. fever is saddle back type

 answer  c. it is transmitted by aedes aegypti .

163q: specificity increases with ?

a. increase in false positive
b. increase in false negative
c. increase in true positive
d. increase in true negative

 answer  d. increase in true negative . 

164q: sensitivity is ?

 answer  true positives 

165q: the ratio between incidence of disease among exposed and non-exposed is called as ?

a. relative risk
b. odds ratio
c. attributable risk
d. none of the above

 answer a.  relative risk . in the same question if there is minus instead of ratio then it is attributable risk .